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"With more than 2 million entries, PQD&T is the single, central, authoritative resource for information about doctoral dissertations and master's theses. Dissertations published from 1980 forward include 350- word abstracts written by the author. Master's theses published from 1988 forward include 150-word abstracts. Titles available as native or image PDF formats include free twenty-four page previews. UMI offers over 1.8 million titles for purchase in microform, paper or electronic formats." As of July 2006, the Lehigh library provides full-access to all institution's digital dissertations in the humanities and the social sciences, including education (Part A) from at least 1997 to present. These full-text copies in PDF may be downloaded online without cost to the Lehigh user. To borrow an older dissertation from another institution, use ILLIAD, our enhanced interlibrary loan service and use the "request a thesis" form. PQDT is searchable by broad subject categories, authors, advisor name, institution name, keywords, etc. Default search is of the citation and abstract.